﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Xml.Serialization;

namespace Sinacor.OMM.HealthMonitor.Entity.Common
{

//    [XmlRoot("dictionary")]

    public class SerializableDictionary<TKey, TValue>

        : Dictionary<TKey, TValue>, IXmlSerializable
    {

        #region IXmlSerializable Members

        public System.Xml.Schema.XmlSchema GetSchema()
        {
            return null;
        }

        public void ReadXml(System.Xml.XmlReader reader)
        {

            XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));

            bool wasEmpty = reader.IsEmptyElement;

            reader.Read();

            if (wasEmpty)
                return;



            while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
            {

                reader.ReadStartElement("item");
                reader.ReadStartElement("key");

                TKey key = (TKey)keySerializer.Deserialize(reader);

                reader.ReadEndElement();
                reader.ReadStartElement("value");

                TValue value = (TValue)valueSerializer.Deserialize(reader);

                reader.ReadEndElement();
                
                this.Add(key, value);

                reader.ReadEndElement();
                reader.MoveToContent();

            }

            reader.ReadEndElement();

        }



        public void WriteXml(System.Xml.XmlWriter writer)
        {

            XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
            XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));

            foreach (TKey key in this.Keys)
            {

                writer.WriteStartElement("item");
                writer.WriteStartElement("key");
                keySerializer.Serialize(writer, key);
                writer.WriteEndElement();
                writer.WriteStartElement("value");
                TValue value = this[key];
                valueSerializer.Serialize(writer, value);
                writer.WriteEndElement();
                writer.WriteEndElement();
            }
        }

        #endregion

    }


}
